title: Purification of pregnancy-associated alpha-macroglobulin by buffer electrofocusing.
mesh_terms: D000645:Ammonium Sulfate; D002021:Buffers; D002852:Chromatography, Ion Exchange; D005260:Female; D006801:Humans; D005779:Immunodiffusion; D007525:Isoelectric Focusing / Q000379:methods; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000302:isolation & purification*
chemical_list: D002021:Buffers; D011257:Pregnancy Proteins; D000645:Ammonium Sulfate